did you run the php file? and are you getting any errors?

I like the hack, but the instructions need to be re-done a bit. There are far too many errors in the installation instructions themselves and it's making it hard to fully understand.

I did run the php manually, it does create the 2nd image. I do get these errors though,

Fatal error: Call to undefined function: imagecreatefromjpeg() in /path/signature.php on line 84

let me see.

Do you have GD 2.0 installed?

it looks like you didnt enter in the right table prefix.

how do I find out the table prefix?

like what are your tables named in your database, i think the standard is 'vb3_' look at one of your tables for example vb3_user

Standard is no table prefix at all :)

You can check your prefix either by going into the db via php my admin or you can go into your config file and looking at what you entered :)

sweet, that was the trick. I had no table prefix defined, it was just "" so now it works perfect.